Least k such that Sum_{i=1..k} 1/phi(i) >= n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =13a(5) =22a(6) =38a(7) =63a(8) =105a(9) =177a(10) =296a(11) =495a(12) =828a(13) =1386a(14) =2318a(15) =3879a(16) =6489a(17) =10854a(18) =18158a(19) =30375a(20) =50811a(21) =84998a(22) =142187a(23) =237853a(24) =397885a(25) =665589a(26) =1113411a(27) =1862534a(28) =3115683a(29) =5211973